Design of Liquid Level Control System Based on PLC

摘要

Along with the development of industrial automation, liquid level control system has been widely used. In this paper, based on PLC a control system is established by PID algorithm and this control system can adjust liquid level automatically. PLC obtains liquid height through sensing circuit and determines the PID parameters through automatic adjustment mode. Then PLC controls liquid level by controlling working hours of DC pump. This system meets perfectly the demand of liquid level control system in industry, and it brings convenient and accurate for controlling. (Abstract).